The length of each side of a regular polygon is 1.3 cm. The perimeter of polygon is 10.4 cm How many sides does the polygon have?

Given:

Length of each side of polygon  =  1.3 cm

Perimeter of polygon                    =   10.4 cm

To do: Find how many sides does the polygon have.

Solution:

Perimeter is nothing but the sum of all sides of polygon

Lets take the number of sides     =   n

Number of sides   n   =   Sum of all sides of polygon  $\div$  Length of each side of polygon

                                        =    $\frac{10.4}{1.3}$

                                        =  $\frac{104}{13}$         [multiply by 10 on both numerator and denominator]

                                    n   =   8

So, the number of sides of polygon = 8